It is outer space might provide us with new energy sources.

A．where B．which C．what D．that

D

【解析】

試題分析：句意：外太空可能會(huì)提供給我們一些新的能源。A．where地點(diǎn)狀語，引導(dǎo)定語從句、名詞性從句或狀語從句；B．which引導(dǎo)定語從句，做主語或賓語； C．what引導(dǎo)名詞性從句，做主語或賓語；D．that引導(dǎo)定語從句，做主語或賓語；引導(dǎo)名詞性從句，不做任何成分或與It is構(gòu)成強(qiáng)調(diào)句。強(qiáng)調(diào)句的陳述結(jié)構(gòu)是it is+被強(qiáng)調(diào)部分+that，去掉句子仍然完整。故選D。

考點(diǎn)：考查強(qiáng)調(diào)句的用法。

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